Pres. Cont.: I am waling in the park. I am not walking in the park. Am I walking in the park?
Pres. Simp.: He walks in the park. He does not walk in the park. Does he walk in the park?
Past Simp.: She walked in the park. She did not walk in the park. Did she walk in the park?
Future: We will walk in the park. We will not walk in the park. Will we walk in the park?
Past Cont.: They were walking in the park. They were not walking in the park. Were they walking in the park?
Pres. Cont.: I am waling in the park. I am not walking in the park. Am I walking in the park?
Pres. Simp.: He walks in the park. He does not walk in the park. Does he walk in the park?
Past Simp.: She walked in the park. She did not walk in the park. Did she walk in the park?
Future: We will walk in the park. We will not walk in the park. Will we walk in the park?
Past Cont.: They were walking in the park. They were not walking in the park. Were they walking in the park?